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qemu-e2k/hw/stellaris.c
pbrook 9ee6e8bb85 ARMv7 support. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3572 c046a42c-6fe2-441c-8c8c-71466251a162
2007-11-11 00:04:49 +00:00

1102 lines
28 KiB
C
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/*
* Luminary Micro Stellaris preipherals
*
* Copyright (c) 2006 CodeSourcery.
* Written by Paul Brook
*
* This code is licenced under the GPL.
*/
#include "vl.h"
#include "arm_pic.h"
typedef const struct {
const char *name;
uint32_t did0;
uint32_t did1;
uint32_t dc0;
uint32_t dc1;
uint32_t dc2;
uint32_t dc3;
uint32_t dc4;
enum {OLED_I2C, OLED_SSI} oled;
} stellaris_board_info;
/* General purpose timer module. */
/* Multiplication factor to convert from GPTM timer ticks to qemu timer
ticks. */
static int stellaris_clock_scale;
typedef struct gptm_state {
uint32_t config;
uint32_t mode[2];
uint32_t control;
uint32_t state;
uint32_t mask;
uint32_t load[2];
uint32_t match[2];
uint32_t prescale[2];
uint32_t match_prescale[2];
uint32_t rtc;
int64_t tick[2];
struct gptm_state *opaque[2];
uint32_t base;
QEMUTimer *timer[2];
/* The timers have an alternate output used to trigger the ADC. */
qemu_irq trigger;
qemu_irq irq;
} gptm_state;
static void gptm_update_irq(gptm_state *s)
{
int level;
level = (s->state & s->mask) != 0;
qemu_set_irq(s->irq, level);
}
static void gptm_stop(gptm_state *s, int n)
{
qemu_del_timer(s->timer[n]);
}
static void gptm_reload(gptm_state *s, int n, int reset)
{
int64_t tick;
if (reset)
tick = qemu_get_clock(vm_clock);
else
tick = s->tick[n];
if (s->config == 0) {
/* 32-bit CountDown. */
uint32_t count;
count = s->load[0] | (s->load[1] << 16);
tick += (int64_t)count * stellaris_clock_scale;
} else if (s->config == 1) {
/* 32-bit RTC. 1Hz tick. */
tick += ticks_per_sec;
} else if (s->mode[n] == 0xa) {
/* PWM mode. Not implemented. */
} else {
cpu_abort(cpu_single_env, "TODO: 16-bit timer mode 0x%x\n",
s->mode[n]);
}
s->tick[n] = tick;
qemu_mod_timer(s->timer[n], tick);
}
static void gptm_tick(void *opaque)
{
gptm_state **p = (gptm_state **)opaque;
gptm_state *s;
int n;
s = *p;
n = p - s->opaque;
if (s->config == 0) {
s->state |= 1;
if ((s->control & 0x20)) {
/* Output trigger. */
qemu_irq_raise(s->trigger);
qemu_irq_lower(s->trigger);
}
if (s->mode[0] & 1) {
/* One-shot. */
s->control &= ~1;
} else {
/* Periodic. */
gptm_reload(s, 0, 0);
}
} else if (s->config == 1) {
/* RTC. */
uint32_t match;
s->rtc++;
match = s->match[0] | (s->match[1] << 16);
if (s->rtc > match)
s->rtc = 0;
if (s->rtc == 0) {
s->state |= 8;
}
gptm_reload(s, 0, 0);
} else if (s->mode[n] == 0xa) {
/* PWM mode. Not implemented. */
} else {
cpu_abort(cpu_single_env, "TODO: 16-bit timer mode 0x%x\n",
s->mode[n]);
}
gptm_update_irq(s);
}
static uint32_t gptm_read(void *opaque, target_phys_addr_t offset)
{
gptm_state *s = (gptm_state *)opaque;
offset -= s->base;
switch (offset) {
case 0x00: /* CFG */
return s->config;
case 0x04: /* TAMR */
return s->mode[0];
case 0x08: /* TBMR */
return s->mode[1];
case 0x0c: /* CTL */
return s->control;
case 0x18: /* IMR */
return s->mask;
case 0x1c: /* RIS */
return s->state;
case 0x20: /* MIS */
return s->state & s->mask;
case 0x24: /* CR */
return 0;
case 0x28: /* TAILR */
return s->load[0] | ((s->config < 4) ? (s->load[1] << 16) : 0);
case 0x2c: /* TBILR */
return s->load[1];
case 0x30: /* TAMARCHR */
return s->match[0] | ((s->config < 4) ? (s->match[1] << 16) : 0);
case 0x34: /* TBMATCHR */
return s->match[1];
case 0x38: /* TAPR */
return s->prescale[0];
case 0x3c: /* TBPR */
return s->prescale[1];
case 0x40: /* TAPMR */
return s->match_prescale[0];
case 0x44: /* TBPMR */
return s->match_prescale[1];
case 0x48: /* TAR */
if (s->control == 1)
return s->rtc;
case 0x4c: /* TBR */
cpu_abort(cpu_single_env, "TODO: Timer value read\n");
default:
cpu_abort(cpu_single_env, "gptm_read: Bad offset 0x%x\n", (int)offset);
return 0;
}
}
static void gptm_write(void *opaque, target_phys_addr_t offset, uint32_t value)
{
gptm_state *s = (gptm_state *)opaque;
uint32_t oldval;
offset -= s->base;
/* The timers should be disabled before changing the configuration.
We take advantage of this and defer everything until the timer
is enabled. */
switch (offset) {
case 0x00: /* CFG */
s->config = value;
break;
case 0x04: /* TAMR */
s->mode[0] = value;
break;
case 0x08: /* TBMR */
s->mode[1] = value;
break;
case 0x0c: /* CTL */
oldval = s->control;
s->control = value;
/* TODO: Implement pause. */
if ((oldval ^ value) & 1) {
if (value & 1) {
gptm_reload(s, 0, 1);
} else {
gptm_stop(s, 0);
}
}
if (((oldval ^ value) & 0x100) && s->config >= 4) {
if (value & 0x100) {
gptm_reload(s, 1, 1);
} else {
gptm_stop(s, 1);
}
}
break;
case 0x18: /* IMR */
s->mask = value & 0x77;
gptm_update_irq(s);
break;
case 0x24: /* CR */
s->state &= ~value;
break;
case 0x28: /* TAILR */
s->load[0] = value & 0xffff;
if (s->config < 4) {
s->load[1] = value >> 16;
}
break;
case 0x2c: /* TBILR */
s->load[1] = value & 0xffff;
break;
case 0x30: /* TAMARCHR */
s->match[0] = value & 0xffff;
if (s->config < 4) {
s->match[1] = value >> 16;
}
break;
case 0x34: /* TBMATCHR */
s->match[1] = value >> 16;
break;
case 0x38: /* TAPR */
s->prescale[0] = value;
break;
case 0x3c: /* TBPR */
s->prescale[1] = value;
break;
case 0x40: /* TAPMR */
s->match_prescale[0] = value;
break;
case 0x44: /* TBPMR */
s->match_prescale[0] = value;
break;
default:
cpu_abort(cpu_single_env, "gptm_write: Bad offset 0x%x\n", (int)offset);
}
gptm_update_irq(s);
}
static CPUReadMemoryFunc *gptm_readfn[] = {
gptm_read,
gptm_read,
gptm_read
};
static CPUWriteMemoryFunc *gptm_writefn[] = {
gptm_write,
gptm_write,
gptm_write
};
static void stellaris_gptm_init(uint32_t base, qemu_irq irq, qemu_irq trigger)
{
int iomemtype;
gptm_state *s;
s = (gptm_state *)qemu_mallocz(sizeof(gptm_state));
s->base = base;
s->irq = irq;
s->trigger = trigger;
s->opaque[0] = s->opaque[1] = s;
iomemtype = cpu_register_io_memory(0, gptm_readfn,
gptm_writefn, s);
cpu_register_physical_memory(base, 0x00001000, iomemtype);
s->timer[0] = qemu_new_timer(vm_clock, gptm_tick, &s->opaque[0]);
s->timer[1] = qemu_new_timer(vm_clock, gptm_tick, &s->opaque[1]);
/* ??? Save/restore. */
}
/* System controller. */
typedef struct {
uint32_t base;
uint32_t pborctl;
uint32_t ldopctl;
uint32_t int_status;
uint32_t int_mask;
uint32_t resc;
uint32_t rcc;
uint32_t rcgc[3];
uint32_t scgc[3];
uint32_t dcgc[3];
uint32_t clkvclr;
uint32_t ldoarst;
qemu_irq irq;
stellaris_board_info *board;
} ssys_state;
static void ssys_update(ssys_state *s)
{
qemu_set_irq(s->irq, (s->int_status & s->int_mask) != 0);
}
static uint32_t pllcfg_sandstorm[16] = {
0x31c0, /* 1 Mhz */
0x1ae0, /* 1.8432 Mhz */
0x18c0, /* 2 Mhz */
0xd573, /* 2.4576 Mhz */
0x37a6, /* 3.57954 Mhz */
0x1ae2, /* 3.6864 Mhz */
0x0c40, /* 4 Mhz */
0x98bc, /* 4.906 Mhz */
0x935b, /* 4.9152 Mhz */
0x09c0, /* 5 Mhz */
0x4dee, /* 5.12 Mhz */
0x0c41, /* 6 Mhz */
0x75db, /* 6.144 Mhz */
0x1ae6, /* 7.3728 Mhz */
0x0600, /* 8 Mhz */
0x585b /* 8.192 Mhz */
};
static uint32_t pllcfg_fury[16] = {
0x3200, /* 1 Mhz */
0x1b20, /* 1.8432 Mhz */
0x1900, /* 2 Mhz */
0xf42b, /* 2.4576 Mhz */
0x37e3, /* 3.57954 Mhz */
0x1b21, /* 3.6864 Mhz */
0x0c80, /* 4 Mhz */
0x98ee, /* 4.906 Mhz */
0xd5b4, /* 4.9152 Mhz */
0x0a00, /* 5 Mhz */
0x4e27, /* 5.12 Mhz */
0x1902, /* 6 Mhz */
0xec1c, /* 6.144 Mhz */
0x1b23, /* 7.3728 Mhz */
0x0640, /* 8 Mhz */
0xb11c /* 8.192 Mhz */
};
static uint32_t ssys_read(void *opaque, target_phys_addr_t offset)
{
ssys_state *s = (ssys_state *)opaque;
offset -= s->base;
switch (offset) {
case 0x000: /* DID0 */
return s->board->did0;
case 0x004: /* DID1 */
return s->board->did1;
case 0x008: /* DC0 */
return s->board->dc0;
case 0x010: /* DC1 */
return s->board->dc1;
case 0x014: /* DC2 */
return s->board->dc2;
case 0x018: /* DC3 */
return s->board->dc3;
case 0x01c: /* DC4 */
return s->board->dc4;
case 0x030: /* PBORCTL */
return s->pborctl;
case 0x034: /* LDOPCTL */
return s->ldopctl;
case 0x040: /* SRCR0 */
return 0;
case 0x044: /* SRCR1 */
return 0;
case 0x048: /* SRCR2 */
return 0;
case 0x050: /* RIS */
return s->int_status;
case 0x054: /* IMC */
return s->int_mask;
case 0x058: /* MISC */
return s->int_status & s->int_mask;
case 0x05c: /* RESC */
return s->resc;
case 0x060: /* RCC */
return s->rcc;
case 0x064: /* PLLCFG */
{
int xtal;
xtal = (s->rcc >> 6) & 0xf;
if (s->board->did0 & (1 << 16)) {
return pllcfg_fury[xtal];
} else {
return pllcfg_sandstorm[xtal];
}
}
case 0x100: /* RCGC0 */
return s->rcgc[0];
case 0x104: /* RCGC1 */
return s->rcgc[1];
case 0x108: /* RCGC2 */
return s->rcgc[2];
case 0x110: /* SCGC0 */
return s->scgc[0];
case 0x114: /* SCGC1 */
return s->scgc[1];
case 0x118: /* SCGC2 */
return s->scgc[2];
case 0x120: /* DCGC0 */
return s->dcgc[0];
case 0x124: /* DCGC1 */
return s->dcgc[1];
case 0x128: /* DCGC2 */
return s->dcgc[2];
case 0x150: /* CLKVCLR */
return s->clkvclr;
case 0x160: /* LDOARST */
return s->ldoarst;
default:
cpu_abort(cpu_single_env, "gptm_read: Bad offset 0x%x\n", (int)offset);
return 0;
}
}
static void ssys_write(void *opaque, target_phys_addr_t offset, uint32_t value)
{
ssys_state *s = (ssys_state *)opaque;
offset -= s->base;
switch (offset) {
case 0x030: /* PBORCTL */
s->pborctl = value & 0xffff;
break;
case 0x034: /* LDOPCTL */
s->ldopctl = value & 0x1f;
break;
case 0x040: /* SRCR0 */
case 0x044: /* SRCR1 */
case 0x048: /* SRCR2 */
fprintf(stderr, "Peripheral reset not implemented\n");
break;
case 0x054: /* IMC */
s->int_mask = value & 0x7f;
break;
case 0x058: /* MISC */
s->int_status &= ~value;
break;
case 0x05c: /* RESC */
s->resc = value & 0x3f;
break;
case 0x060: /* RCC */
if ((s->rcc & (1 << 13)) != 0 && (value & (1 << 13)) == 0) {
/* PLL enable. */
s->int_status |= (1 << 6);
}
s->rcc = value;
stellaris_clock_scale = 5 * (((s->rcc >> 23) & 0xf) + 1);
break;
case 0x100: /* RCGC0 */
s->rcgc[0] = value;
break;
case 0x104: /* RCGC1 */
s->rcgc[1] = value;
break;
case 0x108: /* RCGC2 */
s->rcgc[2] = value;
break;
case 0x110: /* SCGC0 */
s->scgc[0] = value;
break;
case 0x114: /* SCGC1 */
s->scgc[1] = value;
break;
case 0x118: /* SCGC2 */
s->scgc[2] = value;
break;
case 0x120: /* DCGC0 */
s->dcgc[0] = value;
break;
case 0x124: /* DCGC1 */
s->dcgc[1] = value;
break;
case 0x128: /* DCGC2 */
s->dcgc[2] = value;
break;
case 0x150: /* CLKVCLR */
s->clkvclr = value;
break;
case 0x160: /* LDOARST */
s->ldoarst = value;
break;
default:
cpu_abort(cpu_single_env, "gptm_write: Bad offset 0x%x\n", (int)offset);
}
ssys_update(s);
}
static CPUReadMemoryFunc *ssys_readfn[] = {
ssys_read,
ssys_read,
ssys_read
};
static CPUWriteMemoryFunc *ssys_writefn[] = {
ssys_write,
ssys_write,
ssys_write
};
void ssys_reset(void *opaque)
{
ssys_state *s = (ssys_state *)opaque;
s->pborctl = 0x7ffd;
s->rcc = 0x078e3ac0;
s->rcgc[0] = 1;
s->scgc[0] = 1;
s->dcgc[0] = 1;
}
static void stellaris_sys_init(uint32_t base, qemu_irq irq,
stellaris_board_info * board)
{
int iomemtype;
ssys_state *s;
s = (ssys_state *)qemu_mallocz(sizeof(ssys_state));
s->base = base;
s->irq = irq;
s->board = board;
iomemtype = cpu_register_io_memory(0, ssys_readfn,
ssys_writefn, s);
cpu_register_physical_memory(base, 0x00001000, iomemtype);
ssys_reset(s);
/* ??? Save/restore. */
}
/* I2C controller. */
typedef struct {
i2c_bus *bus;
qemu_irq irq;
uint32_t base;
uint32_t msa;
uint32_t mcs;
uint32_t mdr;
uint32_t mtpr;
uint32_t mimr;
uint32_t mris;
uint32_t mcr;
} stellaris_i2c_state;
#define STELLARIS_I2C_MCS_BUSY 0x01
#define STELLARIS_I2C_MCS_ERROR 0x02
#define STELLARIS_I2C_MCS_ADRACK 0x04
#define STELLARIS_I2C_MCS_DATACK 0x08
#define STELLARIS_I2C_MCS_ARBLST 0x10
#define STELLARIS_I2C_MCS_IDLE 0x20
#define STELLARIS_I2C_MCS_BUSBSY 0x40
static uint32_t stellaris_i2c_read(void *opaque, target_phys_addr_t offset)
{
stellaris_i2c_state *s = (stellaris_i2c_state *)opaque;
offset -= s->base;
switch (offset) {
case 0x00: /* MSA */
return s->msa;
case 0x04: /* MCS */
/* We don't emulate timing, so the controller is never busy. */
return s->mcs | STELLARIS_I2C_MCS_IDLE;
case 0x08: /* MDR */
return s->mdr;
case 0x0c: /* MTPR */
return s->mtpr;
case 0x10: /* MIMR */
return s->mimr;
case 0x14: /* MRIS */
return s->mris;
case 0x18: /* MMIS */
return s->mris & s->mimr;
case 0x20: /* MCR */
return s->mcr;
default:
cpu_abort(cpu_single_env, "strllaris_i2c_read: Bad offset 0x%x\n",
(int)offset);
return 0;
}
}
static void stellaris_i2c_update(stellaris_i2c_state *s)
{
int level;
level = (s->mris & s->mimr) != 0;
qemu_set_irq(s->irq, level);
}
static void stellaris_i2c_write(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
stellaris_i2c_state *s = (stellaris_i2c_state *)opaque;
offset -= s->base;
switch (offset) {
case 0x00: /* MSA */
s->msa = value & 0xff;
break;
case 0x04: /* MCS */
if ((s->mcr & 0x10) == 0) {
/* Disabled. Do nothing. */
break;
}
/* Grab the bus if this is starting a transfer. */
if ((value & 2) && (s->mcs & STELLARIS_I2C_MCS_BUSBSY) == 0) {
if (i2c_start_transfer(s->bus, s->msa >> 1, s->msa & 1)) {
s->mcs |= STELLARIS_I2C_MCS_ARBLST;
} else {
s->mcs &= ~STELLARIS_I2C_MCS_ARBLST;
s->mcs |= STELLARIS_I2C_MCS_BUSBSY;
}
}
/* If we don't have the bus then indicate an error. */
if (!i2c_bus_busy(s->bus)
|| (s->mcs & STELLARIS_I2C_MCS_BUSBSY) == 0) {
s->mcs |= STELLARIS_I2C_MCS_ERROR;
break;
}
s->mcs &= ~STELLARIS_I2C_MCS_ERROR;
if (value & 1) {
/* Transfer a byte. */
/* TODO: Handle errors. */
if (s->msa & 1) {
/* Recv */
s->mdr = i2c_recv(s->bus) & 0xff;
} else {
/* Send */
i2c_send(s->bus, s->mdr);
}
/* Raise an interrupt. */
s->mris |= 1;
}
if (value & 4) {
/* Finish transfer. */
i2c_end_transfer(s->bus);
s->mcs &= ~STELLARIS_I2C_MCS_BUSBSY;
}
break;
case 0x08: /* MDR */
s->mdr = value & 0xff;
break;
case 0x0c: /* MTPR */
s->mtpr = value & 0xff;
break;
case 0x10: /* MIMR */
s->mimr = 1;
break;
case 0x1c: /* MICR */
s->mris &= ~value;
break;
case 0x20: /* MCR */
if (value & 1)
cpu_abort(cpu_single_env,
"stellaris_i2c_write: Loopback not implemented\n");
if (value & 0x20)
cpu_abort(cpu_single_env,
"stellaris_i2c_write: Slave mode not implemented\n");
s->mcr = value & 0x31;
break;
default:
cpu_abort(cpu_single_env, "stellaris_i2c_write: Bad offset 0x%x\n",
(int)offset);
}
stellaris_i2c_update(s);
}
static void stellaris_i2c_reset(stellaris_i2c_state *s)
{
if (s->mcs & STELLARIS_I2C_MCS_BUSBSY)
i2c_end_transfer(s->bus);
s->msa = 0;
s->mcs = 0;
s->mdr = 0;
s->mtpr = 1;
s->mimr = 0;
s->mris = 0;
s->mcr = 0;
stellaris_i2c_update(s);
}
static CPUReadMemoryFunc *stellaris_i2c_readfn[] = {
stellaris_i2c_read,
stellaris_i2c_read,
stellaris_i2c_read
};
static CPUWriteMemoryFunc *stellaris_i2c_writefn[] = {
stellaris_i2c_write,
stellaris_i2c_write,
stellaris_i2c_write
};
static void stellaris_i2c_init(uint32_t base, qemu_irq irq, i2c_bus *bus)
{
stellaris_i2c_state *s;
int iomemtype;
s = (stellaris_i2c_state *)qemu_mallocz(sizeof(stellaris_i2c_state));
s->base = base;
s->irq = irq;
s->bus = bus;
iomemtype = cpu_register_io_memory(0, stellaris_i2c_readfn,
stellaris_i2c_writefn, s);
cpu_register_physical_memory(base, 0x00001000, iomemtype);
/* ??? For now we only implement the master interface. */
stellaris_i2c_reset(s);
}
/* Analogue to Digital Converter. This is only partially implemented,
enough for applications that use a combined ADC and timer tick. */
#define STELLARIS_ADC_EM_CONTROLLER 0
#define STELLARIS_ADC_EM_COMP 1
#define STELLARIS_ADC_EM_EXTERNAL 4
#define STELLARIS_ADC_EM_TIMER 5
#define STELLARIS_ADC_EM_PWM0 6
#define STELLARIS_ADC_EM_PWM1 7
#define STELLARIS_ADC_EM_PWM2 8
#define STELLARIS_ADC_FIFO_EMPTY 0x0100
#define STELLARIS_ADC_FIFO_FULL 0x1000
typedef struct
{
uint32_t base;
uint32_t actss;
uint32_t ris;
uint32_t im;
uint32_t emux;
uint32_t ostat;
uint32_t ustat;
uint32_t sspri;
uint32_t sac;
struct {
uint32_t state;
uint32_t data[16];
} fifo[4];
uint32_t ssmux[4];
uint32_t ssctl[4];
qemu_irq irq;
} stellaris_adc_state;
static uint32_t stellaris_adc_fifo_read(stellaris_adc_state *s, int n)
{
int tail;
tail = s->fifo[n].state & 0xf;
if (s->fifo[n].state & STELLARIS_ADC_FIFO_EMPTY) {
s->ustat |= 1 << n;
} else {
s->fifo[n].state = (s->fifo[n].state & ~0xf) | ((tail + 1) & 0xf);
s->fifo[n].state &= ~STELLARIS_ADC_FIFO_FULL;
if (tail + 1 == ((s->fifo[n].state >> 4) & 0xf))
s->fifo[n].state |= STELLARIS_ADC_FIFO_EMPTY;
}
return s->fifo[n].data[tail];
}
static void stellaris_adc_fifo_write(stellaris_adc_state *s, int n,
uint32_t value)
{
int head;
head = (s->fifo[n].state >> 4) & 0xf;
if (s->fifo[n].state & STELLARIS_ADC_FIFO_FULL) {
s->ostat |= 1 << n;
return;
}
s->fifo[n].data[head] = value;
head = (head + 1) & 0xf;
s->fifo[n].state &= ~STELLARIS_ADC_FIFO_EMPTY;
s->fifo[n].state = (s->fifo[n].state & ~0xf0) | (head << 4);
if ((s->fifo[n].state & 0xf) == head)
s->fifo[n].state |= STELLARIS_ADC_FIFO_FULL;
}
static void stellaris_adc_update(stellaris_adc_state *s)
{
int level;
level = (s->ris & s->im) != 0;
qemu_set_irq(s->irq, level);
}
static void stellaris_adc_trigger(void *opaque, int irq, int level)
{
stellaris_adc_state *s = (stellaris_adc_state *)opaque;
/* Some applications use the ADC as a random number source, so introduce
some variation into the signal. */
static uint32_t noise = 0;
if ((s->actss & 1) == 0) {
return;
}
noise = noise * 314159 + 1;
/* ??? actual inputs not implemented. Return an arbitrary value. */
stellaris_adc_fifo_write(s, 0, 0x200 + ((noise >> 16) & 7));
s->ris |= 1;
stellaris_adc_update(s);
}
static void stellaris_adc_reset(stellaris_adc_state *s)
{
int n;
for (n = 0; n < 4; n++) {
s->ssmux[n] = 0;
s->ssctl[n] = 0;
s->fifo[n].state = STELLARIS_ADC_FIFO_EMPTY;
}
}
static uint32_t stellaris_adc_read(void *opaque, target_phys_addr_t offset)
{
stellaris_adc_state *s = (stellaris_adc_state *)opaque;
/* TODO: Implement this. */
offset -= s->base;
if (offset >= 0x40 && offset < 0xc0) {
int n;
n = (offset - 0x40) >> 5;
switch (offset & 0x1f) {
case 0x00: /* SSMUX */
return s->ssmux[n];
case 0x04: /* SSCTL */
return s->ssctl[n];
case 0x08: /* SSFIFO */
return stellaris_adc_fifo_read(s, n);
case 0x0c: /* SSFSTAT */
return s->fifo[n].state;
default:
break;
}
}
switch (offset) {
case 0x00: /* ACTSS */
return s->actss;
case 0x04: /* RIS */
return s->ris;
case 0x08: /* IM */
return s->im;
case 0x0c: /* ISC */
return s->ris & s->im;
case 0x10: /* OSTAT */
return s->ostat;
case 0x14: /* EMUX */
return s->emux;
case 0x18: /* USTAT */
return s->ustat;
case 0x20: /* SSPRI */
return s->sspri;
case 0x30: /* SAC */
return s->sac;
default:
cpu_abort(cpu_single_env, "strllaris_adc_read: Bad offset 0x%x\n",
(int)offset);
return 0;
}
}
static void stellaris_adc_write(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
stellaris_adc_state *s = (stellaris_adc_state *)opaque;
/* TODO: Implement this. */
offset -= s->base;
if (offset >= 0x40 && offset < 0xc0) {
int n;
n = (offset - 0x40) >> 5;
switch (offset & 0x1f) {
case 0x00: /* SSMUX */
s->ssmux[n] = value & 0x33333333;
return;
case 0x04: /* SSCTL */
if (value != 6) {
cpu_abort(cpu_single_env, "ADC: Unimplemented sequence %x\n",
value);
}
s->ssctl[n] = value;
return;
default:
break;
}
}
switch (offset) {
case 0x00: /* ACTSS */
s->actss = value & 0xf;
if (value & 0xe) {
cpu_abort(cpu_single_env,
"Not implemented: ADC sequencers 1-3\n");
}
break;
case 0x08: /* IM */
s->im = value;
break;
case 0x0c: /* ISC */
s->ris &= ~value;
break;
case 0x10: /* OSTAT */
s->ostat &= ~value;
break;
case 0x14: /* EMUX */
s->emux = value;
break;
case 0x18: /* USTAT */
s->ustat &= ~value;
break;
case 0x20: /* SSPRI */
s->sspri = value;
break;
case 0x28: /* PSSI */
cpu_abort(cpu_single_env, "Not implemented: ADC sample initiate\n");
break;
case 0x30: /* SAC */
s->sac = value;
break;
default:
cpu_abort(cpu_single_env, "stellaris_adc_write: Bad offset 0x%x\n",
(int)offset);
}
stellaris_adc_update(s);
}
static CPUReadMemoryFunc *stellaris_adc_readfn[] = {
stellaris_adc_read,
stellaris_adc_read,
stellaris_adc_read
};
static CPUWriteMemoryFunc *stellaris_adc_writefn[] = {
stellaris_adc_write,
stellaris_adc_write,
stellaris_adc_write
};
static qemu_irq stellaris_adc_init(uint32_t base, qemu_irq irq)
{
stellaris_adc_state *s;
int iomemtype;
qemu_irq *qi;
s = (stellaris_adc_state *)qemu_mallocz(sizeof(stellaris_adc_state));
s->base = base;
s->irq = irq;
iomemtype = cpu_register_io_memory(0, stellaris_adc_readfn,
stellaris_adc_writefn, s);
cpu_register_physical_memory(base, 0x00001000, iomemtype);
stellaris_adc_reset(s);
qi = qemu_allocate_irqs(stellaris_adc_trigger, s, 1);
return qi[0];
}
/* Board init. */
static stellaris_board_info stellaris_boards[] = {
{ "LM3S811EVB",
0,
0x0032000e,
0x001f001f, /* dc0 */
0x001132bf,
0x01071013,
0x3f0f01ff,
0x0000001f,
OLED_I2C
},
{ "LM3S6965EVB",
0x10010002,
0x1073402e,
0x00ff007f, /* dc0 */
0x001133ff,
0x030f5317,
0x0f0f87ff,
0x5000007f,
OLED_SSI
}
};
static void stellaris_init(const char *kernel_filename, const char *cpu_model,
DisplayState *ds, stellaris_board_info *board)
{
static const int uart_irq[] = {5, 6, 33, 34};
static const int timer_irq[] = {19, 21, 23, 35};
static const uint32_t gpio_addr[7] =
{ 0x40004000, 0x40005000, 0x40006000, 0x40007000,
0x40024000, 0x40025000, 0x40026000};
static const int gpio_irq[7] = {0, 1, 2, 3, 4, 30, 31};
qemu_irq *pic;
qemu_irq *gpio_in[5];
qemu_irq *gpio_out[5];
qemu_irq adc;
int sram_size;
int flash_size;
i2c_bus *i2c;
int i;
flash_size = ((board->dc0 & 0xffff) + 1) << 1;
sram_size = (board->dc0 >> 18) + 1;
pic = armv7m_init(flash_size, sram_size, kernel_filename, cpu_model);
if (board->dc1 & (1 << 16)) {
adc = stellaris_adc_init(0x40038000, pic[14]);
} else {
adc = NULL;
}
for (i = 0; i < 4; i++) {
if (board->dc2 & (0x10000 << i)) {
stellaris_gptm_init(0x40030000 + i * 0x1000,
pic[timer_irq[i]], adc);
}
}
stellaris_sys_init(0x400fe000, pic[28], board);
for (i = 0; i < 7; i++) {
if (board->dc4 & (1 << i)) {
gpio_in[i] = pl061_init(gpio_addr[i], pic[gpio_irq[i]],
&gpio_out[i]);
}
}
if (board->dc2 & (1 << 12)) {
i2c = i2c_init_bus();
stellaris_i2c_init(0x40020000, pic[8], i2c);
if (board->oled == OLED_I2C) {
ssd0303_init(ds, i2c, 0x3d);
}
}
for (i = 0; i < 4; i++) {
if (board->dc2 & (1 << i)) {
pl011_init(0x4000c000 + i * 0x1000, pic[uart_irq[i]],
serial_hds[i], PL011_LUMINARY);
}
}
if (board->dc2 & (1 << 4)) {
if (board->oled == OLED_SSI) {
void * oled;
/* FIXME: Implement chip select for OLED/MMC. */
oled = ssd0323_init(ds, &gpio_out[2][7]);
pl022_init(0x40008000, pic[7], ssd0323_xfer_ssi, oled);
} else {
pl022_init(0x40008000, pic[7], NULL, NULL);
}
}
}
/* FIXME: Figure out how to generate these from stellaris_boards. */
static void lm3s811evb_init(int ram_size, int vga_ram_size,
const char *boot_device, DisplayState *ds,
const char **fd_filename, int snapshot,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
stellaris_init(kernel_filename, cpu_model, ds, &stellaris_boards[0]);
}
static void lm3s6965evb_init(int ram_size, int vga_ram_size,
const char *boot_device, DisplayState *ds,
const char **fd_filename, int snapshot,
const char *kernel_filename, const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
stellaris_init(kernel_filename, cpu_model, ds, &stellaris_boards[1]);
}
QEMUMachine lm3s811evb_machine = {
"lm3s811evb",
"Stellaris LM3S811EVB",
lm3s811evb_init,
};
QEMUMachine lm3s6965evb_machine = {
"lm3s6965evb",
"Stellaris LM3S6965EVB",
lm3s6965evb_init,
};
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